1. A manager of a perfectly competitive firm observes that the marginal product of labor is 4 units per hour, the marginal product of capital is 10 units per machine, the wage is $10 per hour, the rental price of capital is $80 per machine, and the price of output is $5 per unit. To maximize profit, the manager should hire labor and rent capital. a. more, more b. more, less less, more d. less, less C